1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
4 */
5#ifndef _ASM_CACHEFLUSH_H
6#define _ASM_CACHEFLUSH_H
7
8#include <linux/mm.h>
9#include <asm/cpu-info.h>
10#include <asm/cacheops.h>
11
12static inline bool cache_present(struct cache_desc *cdesc)
13{
14	return cdesc->flags & CACHE_PRESENT;
15}
16
17static inline bool cache_private(struct cache_desc *cdesc)
18{
19	return cdesc->flags & CACHE_PRIVATE;
20}
21
22static inline bool cache_inclusive(struct cache_desc *cdesc)
23{
24	return cdesc->flags & CACHE_INCLUSIVE;
25}
26
27static inline unsigned int cpu_last_level_cache_line_size(void)
28{
29	int cache_present = boot_cpu_data.cache_leaves_present;
30
31	return boot_cpu_data.cache_leaves[cache_present - 1].linesz;
32}
33
34asmlinkage void __flush_cache_all(void);
35void local_flush_icache_range(unsigned long start, unsigned long end);
36
37#define flush_icache_range	local_flush_icache_range
38#define flush_icache_user_range	local_flush_icache_range
39
40#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
41
42#define flush_cache_all()				do { } while (0)
43#define flush_cache_mm(mm)				do { } while (0)
44#define flush_cache_dup_mm(mm)				do { } while (0)
45#define flush_cache_range(vma, start, end)		do { } while (0)
46#define flush_cache_page(vma, vmaddr, pfn)		do { } while (0)
47#define flush_cache_vmap(start, end)			do { } while (0)
48#define flush_cache_vunmap(start, end)			do { } while (0)
49#define flush_icache_user_page(vma, page, addr, len)	do { } while (0)
50#define flush_dcache_page(page)				do { } while (0)
51#define flush_dcache_mmap_lock(mapping)			do { } while (0)
52#define flush_dcache_mmap_unlock(mapping)		do { } while (0)
53
54#define cache_op(op, addr)						\
55	__asm__ __volatile__(						\
56	"	cacop	%0, %1					\n"	\
57	:								\
58	: "i" (op), "ZC" (*(unsigned char *)(addr)))
59
60static inline void flush_cache_line(int leaf, unsigned long addr)
61{
62	switch (leaf) {
63	case Cache_LEAF0:
64		cache_op(Index_Writeback_Inv_LEAF0, addr);
65		break;
66	case Cache_LEAF1:
67		cache_op(Index_Writeback_Inv_LEAF1, addr);
68		break;
69	case Cache_LEAF2:
70		cache_op(Index_Writeback_Inv_LEAF2, addr);
71		break;
72	case Cache_LEAF3:
73		cache_op(Index_Writeback_Inv_LEAF3, addr);
74		break;
75	case Cache_LEAF4:
76		cache_op(Index_Writeback_Inv_LEAF4, addr);
77		break;
78	case Cache_LEAF5:
79		cache_op(Index_Writeback_Inv_LEAF5, addr);
80		break;
81	default:
82		break;
83	}
84}
85
86#include <asm-generic/cacheflush.h>
87
88#endif /* _ASM_CACHEFLUSH_H */
89